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Positive Psychosocial Factors and Cognitive Decline in Ethnically Diverse Older Adults

Published online by Cambridge University Press:  25 August 2020

Laura B. Zahodne*
Affiliation:
Department of Psychology, University of Michigan, Ann Arbor, MI48109, USA
Neika Sharifian
Affiliation:
Department of Psychology, University of Michigan, Ann Arbor, MI48109, USA
Ann Zarina Kraal
Affiliation:
Department of Psychology, University of Michigan, Ann Arbor, MI48109, USA
Ketlyne Sol
Affiliation:
Department of Psychology, University of Michigan, Ann Arbor, MI48109, USA
Afsara B. Zaheed
Affiliation:
Department of Psychology, University of Michigan, Ann Arbor, MI48109, USA
Jennifer J. Manly
Affiliation:
Department of Neurology, Gertrude H. Sergievsky Center, Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, Columbia University Medical Center, New York, NY10032, USA
Adam M. Brickman
Affiliation:
Department of Neurology, Gertrude H. Sergievsky Center, Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, Columbia University Medical Center, New York, NY10032, USA
*
*Correspondence and reprint requests to: Laura B. Zahodne, PhD, Department of Psychology, University of Michigan, 530 Church Street, Ann Arbor, MI48104, USA. Email: lzahodne@umich.edu

Abstract

Objectives:

Previous cross-sectional studies have documented associations between positive psychosocial factors, such as self-efficacy and emotional support, and late-life cognition. Further, the magnitudes of concurrent associations may differ across racial and ethnic groups that differ in Alzheimer’s disease risk. The goals of this longitudinal study were to characterize prospective associations between positive psychosocial factors and cognitive decline and explicitly test for differential impact across race and ethnicity.

Methods:

578 older adults (42% non-Hispanic Black, 31% non-Hispanic White, and 28% Hispanic) in the Washington Heights-Inwood Columbia Aging Project completed cognitive and psychosocial measures from the NIH Toolbox and standard neuropsychological tests over 2.4 years. Latent difference scores were used to model associations between positive psychosocial factors and cognitive decline controlling for baseline cognition, sociodemographics, depressive symptoms, physical health, and other positive psychosocial factors. Multiple-group modeling was used to test interactions between the positive psychosocial factors and race/ethnicity.

Results:

Higher NIH Toolbox Friendship scores predicted less episodic memory decline. One standard deviation increase in friendship corresponded to 6 fewer years of memory aging. This association did not significantly differ across racial/ethnic groups.

Conclusions:

This longitudinal study provides support for the potential importance of friendships for subsequent episodic memory trajectories among older adults from three ethnic groups. Further study into culturally informed interventions is needed to investigate whether and how friend networks may be targeted to promote cognitive health in late life.

Type
Regular Research
Copyright
Copyright © INS. Published by Cambridge University Press, 2020

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